Asteroid 7 Iris
7 Iris is a large main-belt asteroid located between the orbits of Mars and Jupiter. It orbits the Sun once every 3.68 Earth years. It was discovered on August 13, 1847 by John Russell Hind and is named after the Greek goddess of the rainbow. Iris has a diameter of approximately 200 kilometers and is irregularly shaped, with a rotation period of about 7.1 hours. In 2007, the European Space Agency launched the Rosetta spacecraft, which passed within 5 million kilometers of Iris and obtained detailed measurements of its surface. These observations, together with ground-based radar observations, revealed that Iris has a highly elongated shape and provided important insights into its rotational dynamics. The study of Iris and its family of asteroids has provided important insights into the formation and evolution of the asteroid belt and the early solar system.
Asteroid 7 Iris is currently in the constellation of Virgo. The current Right Ascension of Asteroid 7 Iris is 13h 53m 54s and the Declination is -16° 03’ 50” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom ). The current magnitude of Asteroid 7 Iris is 10.44 (JPL).
Today's rise, transit and set times of Asteroid 7 Iris from Greenwich, United Kingdom (all times relative to the local timezone Europe/London):
- 7 Iris is below the horizon from Greenwich, United Kingdom .
- Given its current magnitude, 7 Iris is visible with the help of a binocular with a 60mm aperture, might require a small telescope.
- Go to interactive sky chart
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Asteroid 7 Iris Position and Finder Charts
Below we provide Asteroid 7 Iris finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.
Field of view: 50x30 degrees
Field of view: 10x6 degrees
Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 7 Iris is right now. Click on the image to see a more detailed fullscreen tracker view.
RA: 13h 53m 54s
Dec: -16° 03’ 50”
Field of view: 60x40 arcmins
Also check out Where is Asteroid 7 Iris?, a page that provides all the information needed to find Asteroid 7 Iris in the sky and additional links to sky charts.
Asteroid 7 Iris Distance from Earth
The distance of Asteroid 7 Iris from Earth is currently 320,700,930 kilometers, equivalent to 2.143753 Astronomical Units. Light takes 17 minutes and 49.7432 seconds to travel from Asteroid 7 Iris and arrive to us.
The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.
The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest Approach of Asteroid 7 Iris to Earth
Between 1 January 1900 and 31 December 2099, the closest approach of Asteroid 7 Iris to Earth happens on Sat Nov 8 1947 at a distance of 0.846460 Astronomical Units, or 126,628,540 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Asteroid 7 Iris Brightness and Light Curve
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.
Asteroid 7 Iris Orbital Elements
The following table lists the orbital elements of Asteroid 7 Iris at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database
|Perihelion distance||q||1.83876388 AU
|Date of perihelion transit||Tp||2021-Jul-26 23:47:00
|Next perihelion transit||2025-Apr-03 23:28
|Argument of perihelion||peri||145.41271894919°|
|Longitude of the ascending node||node||259.50440351462°|
Visualization of Asteroid 7 Iris Orbit
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!
View Asteroid 7 Iris in the 3D Solar System Simulator
Asteroid 7 Iris Physical Data
The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database
|Physical Parameter||Value||Relative to Earth|
|Sideral Rotation||7.1390 hours||0.2983|
Asteroid 7 Iris 15 Days Ephemeris
The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.
|2023 Jun 03||13h 56m 30s||-16° 34’ 59”||10.30||Virgo|
|2023 Jun 04||13h 56m 04s||-16° 30’ 14”||10.32||Virgo|
|2023 Jun 05||13h 55m 40s||-16° 25’ 35”||10.34||Virgo|
|2023 Jun 06||13h 55m 15s||-16° 21’ 03”||10.36||Virgo|
|2023 Jun 07||13h 54m 53s||-16° 16’ 38”||10.38||Virgo|
|2023 Jun 08||13h 54m 33s||-16° 12’ 20”||10.40||Virgo|
|2023 Jun 09||13h 54m 14s||-16° 08’ 11”||10.42||Virgo|
|2023 Jun 10||13h 53m 56s||-16° 04’ 08”||10.44||Virgo|
|2023 Jun 11||13h 53m 39s||-16° 00’ 12”||10.46||Virgo|
|2023 Jun 12||13h 53m 25s||-15° 56’ 26”||10.48||Virgo|
|2023 Jun 13||13h 53m 11s||-15° 52’ 45”||10.50||Virgo|
|2023 Jun 14||13h 52m 59s||-15° 49’ 14”||10.52||Virgo|
|2023 Jun 15||13h 52m 48s||-15° 45’ 50”||10.53||Virgo|
|2023 Jun 16||13h 52m 38s||-15° 42’ 33”||10.55||Virgo|